I *think* this is everything I have by Lalo Schifrin. It’s hard to know for sure because things are filed in many different places (LPs, CDs, organized by genre, etc). I want to know if there are any real gems that are not in my accumulation. I’m not looking for a laundry list of everything he’s done, but rather key titles that I’m missing:

TELEFON (1977) [+ you get some unreleased Leonard Rosenman along with this]

THE HELLSTROM CHRONICLE, which you mention, is seconded by me. Also, you might want to check out FSM's CD of JERICHO TV scores - Lalo Schifrin scored the pilot episode in 1965 and it sounds very much like his M:I music from 1966.

Does that mean it has that nervous angular longhair sound that I so love?

Yes. It has a lot of low-end piano jabbing. It's got bongos, too. The opening wail is from an Ondes Martenot, I think, but the climax of LES FELINS has avant-garde vocals (sounding almost like Ligeti's choral works).